Toggles a search between hidden and shown states.

<div class="definition">
    toggleSearch(field, [field], ...)
</div>

<div class="arguments">
    <table>
    <tr>
        <td>field</td>
        <td><b>string</b>, field name of the column</td>
    </tr>
    </table>
</div>
Returns integer.

<h4>Description</h4>

This method will show the search if it was previously hidden and hide the search if it was previously shown. If the search field
is hidden, it will not be visible when user opens search overlay and will not display the field if user clicks magnifying glass
icon. Returns the number of toggled searches.
<div style="height: 10px"></div>

If you have grid defined in the following way:
<textarea class="javascript">
let grid = new w2grid({
    name : 'grid',
    columns: [
        { field: 'recid', text: 'ID', size: '50px' },
        { field: 'lname', text: 'Last Name', size: '30%' },
        { field: 'fname', text: 'First Name', size: '30%' },
        { field: 'email', text: 'Email', size: '40%' },
        { field: 'sdate', text: 'Start Date', size: '120px' },
        { field: 'sdate', text: 'End Date', size: '120px' }
    ],
    columns: [
        { field: 'recid', text: 'ID', type: 'text' },
        { field: 'lname', text: 'Last Name', type: 'text' },
        { field: 'fname', text: 'First Name', type: 'text' }
    ],
    records: [
        { recid: 1, fname: 'John', lname: 'doe', email: 'vitali@gmail.com', sdate: '1/3/2012' },
        { recid: 2, fname: 'Stuart', lname: 'Motzart', email: 'jdoe@gmail.com', sdate: '2/4/2012' },
        { recid: 3, fname: 'Jin', lname: 'Franson', email: '--', sdate: '4/23/2012' },
        { recid: 4, fname: 'Susan', lname: 'Ottie', email: 'jdoe@gmail.com', sdate: '5/3/2012' },
        { recid: 5, fname: 'Kelly', lname: 'Silver', email: 'jdoe@gmail.com', sdate: '4/3/2012' },
        { recid: 6, fname: 'Francis', lname: 'Gatos', email: 'vitali@gmail.com', sdate: '2/5/2012' }
    ]
});
</textarea>

You can toggle columns by:
<textarea class="javascript">
grid.toggleSearch('recid', 'fname');
</textarea>